Home / 18,218.82-25,143.06-11,146.61

Finding the Fourth Proportional to 18,218.82, 25,143.06 and 11,146.61

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Solution

The fourth proportional to 18,218.82, 25,143.06 and 11,146.61 is: 15,382.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,218.82 : 25,143.06 = 11,146.61 : x
  2. Step 2: Convert to fraction form
    18,218.82/25,143.06 = 11,146.61/x
  3. Step 3: Cross multiply
    18,218.82x = 25,143.06 × 11,146.61
  4. Step 4: Simplify right side
    18,218.82x = 280,259,925.98
  5. Step 5: Solve for x
    x = 280,259,925.98/18,218.82
  6. Step 6: Final answer
    x = 15,382.99

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.